Sub-woofer speaker



FIG. 1 is a bottom front side perspective view of a sub-woofer speaker, showing my new design.

FIG. 2 is a front, elevational view thereof.

FIG. 3 is a rear, elevational view thereof.

FIG. 4 is a right-hand side, elevational view thereof.

FIG. 5 is a top, plan view thereof; and,

FIG. 6 is a bottom view thereof.

Note that the left-hand side, elevational view (not shown) is a mirror image of FIG. 4.

The broken lines in the drawings represent electrical terminal blocks, which are for illustrative purposes only, and form no part of the claimed design. 

The ornamental design for a sub-woofer speaker, as shown and described. 